ML102590077
| ML102590077 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 10/15/2010 |
| From: | Lisa Regner License Renewal Projects Branch 2 |
| To: | Entergy Nuclear Operations |
| Regner L M, NRR/DLR, 415-1906 | |
| References | |
| TAC MC9669 | |
| Download: ML102590077 (6) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 October 15, 2010 LICENSEE:
Entergy Nuclear Operations, Inc.
FACILITY:
Pilgrim Nuclear Power Station
SUBJECT:
SUMMARY
OF TELEPHONE CONFERENCE CALL HELD ON JUNE 2,2010, BElWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND ENTERGY NUCLEAR OPERATIONS, INC., CONCERNING THE PILGRIM NUCLEAR POWER STATION, LICENSE RENEWAL APPLICATION (TAC NO. MC9669)
The U.S. Nuclear Regulatory Commission (the staff) and representatives of Entergy Nuclear Operations, Inc., (the applicant) held a telephone conference call on June 2,2010, to discuss the Small-Bore Piping Aging Management Program (AMP) concerning the Pilgrim Nuclear Power Station (Pilgrim), license renewal application.
A supplemental review of One-Time Inspection of ASME Code Class 1 Small-Bore Piping Program in the June 2007, Safety Evaluation Report for Pilgrim revealed that the examination of socket welds was not adequately addressed and that the inspection only includes VT-2 (visual) and surface examinations. This is not consistent with the recommendation of Generic Aging Lessons Learned AMP XI.M.35, "One-Time Inspection of ASME Code Class 1 Small-Bore Piping." provides a listing of the participants and Enclosure 2 includes the draft request for additional information discussed with the applicant. including a brief description on the status of the item.
The applicant had an opportunity to comment on this summary.
Lisa M. Regner, Sr. Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket No. 50-293
Enclosures:
As stated cc w/encls: Distribution via Listserv
TELEPHONE CONFERENCE CALL PILGRIM NUCLEAR POWER STATION LICENSE RENEWAL APPLICATION LIST OF PARTICIPANTS JUNE 2, 2010 PARTICIPANTS Lisa Regner Steve Jones Steve Bethay Joe Lynch Fred Mogolesko Dave Heard Paul Smith Rich Pardee Dave Lach Dave King AFFILIATIONS U.S. Nuclear Regulatory Commission (NRC)
NRC Entergy Nuclear Operations. Inc. (Entergy)
Entergy Entergy Entergy Entergy Entergy Entergy Entergy ENCLOSURE 1
DRAFT REQUESTS FOR ADDITIONAL INFORMATION PILGRIM NUCLEAR POWER STATION LICENSE RENEWAL APPLICATION JUNE 2, 2010 DRAFT RAI xxxx - Small-Bore Piping Socket Welds
Background:
During the past year, the U.S. Nuclear Regulatory Commission (NRC or the staff) has worked extensively with license renewal applicants, the Nuclear Energy Institute, and the industry on socket weld examination issues for license renewal. The efforts also include review of operating experience of socket welds and various techniques for examination of socket welds.
The staff finds that volumetric examination of Class 1 small-bore piping socket welds recommended by the Generic Aging Lessons Learned (GALL) Report aging management program (AMP), XI,M.35, "One-Time Inspection of ASNIE Code Class 1 Small-Bore Piping" is warranted based on the operating experience review. It provides additional assurance that either the aging of small-bore American Society of Mechanical Engineers (ASME) Code Class 1 piping is not occurring or that the aging is insignificant.
The staff noted that the VT-2 examination, as ASME Section XI Code currently requires on socket welds, is a leakage detection examination and not adequate for license renewal aging management. Since cracking of socket welds, in most cases, starts from the inside surface, by the time a flaw is detected by VT-2 or a surface examination, the subject component would have already failed and lost its intended function. This is the reason the GALL Report AMP recommends one-time volumetric examinations of small-bore piping, including socket welds.
Examination of the external surface is not an adequate way to detect cracks initiating on the interior surface of a pipe.
The staff also finds that several demonstrated ultrasonic testing (UT) techniques have been developed and used by the nuclear industry. They provide an adequate result in the examination of socket welds. Recently developed and improved techniques have increased the capability to differentiate construction flaws and service induced flaws. Measures have been taken to minimize the possibility of false-positive indications. The GALL Report also recognizes additional options available to applicants for socket weld examinations including performing available industry-demonstrated UT, opportunistic destructive examinations, or Performance Demonstration Initiative qualified UT, when available.
Issue:
A supplemental review of the One-Time Inspection of ASME Code Class 1 Small-Bore Piping Program for Pilgrim Nuclear Power Station revealed that the examination of socket welds was not adequately addressed and that the inspections only include VT-2 and surface examinations.
This is not consistent with the recommendation of the GALL Report.
ENCLOSURE 2
-2 Request:
Explain how the One-Time Inspection of ASME Code Class 1 Small-Bore Piping Program will adequately manage the aging of socket welds given recent industry operating experience.
Discussion:
Entergy Nuclear Operations, Inc. (the applicant) explained that question is clear. The applicant will submit a response addressing the staff's concern.
October 15, 2010 LICENSEE:
Entergy Nuclear Operations, Inc.
FACILITY:
Pilgrim Nuclear Power Station SUB..IECT:
SUMMARY
OF TELEPHONE CONFERENCE CALL HELD ON JUNE 2, 2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND ENTERGY NUCLEAR OPERATIONS, INC., CONCERNING THE PILGRIM NUCLEAR POWER STATION, LICENSE RENEWAL APPLICATION (TAC NO. MC9669)
The U.S. Nuclear Regulatory Commission (the staff) and representatives of Entergy Nuclear Operations, Inc., (the applicant) held a telephone conference call on June 2,2010, to discuss the Small-Bore Piping Aging Management Program (AMP) concerning the Pilgrim Nuclear Power Station (Pilgrim), license renewal application.
A supplemental review of One-Time Inspection of ASME Code Class 1 Small-Bore Piping Program in the June 2007, Safety Evaluation Report for Pilgrim revealed that the examination of socket welds was not adequately addressed and that the inspection only includes VT-2 (visual) and surface examinations. This is not consistent with the recommendation of Generic Aging Lessons Learned AMP XI.M.35, "One-Time Inspection of ASME Code Class 1 Small-Bore Piping." provides a listing of the participants and Enclosure 2 includes the draft request for additional information discussed with the applicant, including a brief description on the status of the item.
The applicant had an opportunity to comment on this summary.
IRA!
Lisa M. Regner, Sr. Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket No. 50-293
Enclosures:
As stated cc w/encls: Distribution via Listserv DISTRIBUTION:
See next page ADAMS Accession No' ML102590077 OFFICE PM:RPB2:DLR LA:RPOB:DLR BC:RPB2:DLR PM:RPB2:DLR NAME LRegner YEdmonds DWrona LRegner DATE 10/04/10 f9!21/10 10/15/10 10/15/10 OFFICIAL RECORD COpy
Memorandum to Entergy Nuclear Operations, Inc. from L Regner dated October 15, 2010
SUBJECT:
SUMMARY
OF TELEPHONE CONFERENCE CALL HELD ON MAY 25,2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND ENTERGY NUCLEAR OPERATIONS, INC., CONCERNING THE ANNUAL UPDATE ASSOCIATED WITH THE PILGRIM NUCLEAR POWER STATION LICENSE RENEWAL APPLICATION DISTRIBUTION:
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